Welcome, make sure you check out the tutorials section for anything tf2specific you might not know yet, the link in my sig for more general mapping stuff and the downloads section for some cool custom content free for you to use.

Constructive Criticism is the most useful. If I tear apart your work it's not because I don't like it, it's because I do. If a user's Comment or Post is useful to you, Make sure to give them "Thanks!".